The conversion of pyruvate into oxaloacetate is an anaplterotic reaction to replenish citrus acid cycle metabolites that were used up during animalism. True or false
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- 1 2 points Order the following TCA cycle metabolites in the order they are produced in one turn of the citric acid cycle. Not all answers will be used. 2 1 4 3 TI Isocitrate Citrate Lactate Pyruvate Oxaloacetate Isocitrate Succinyl-CoA Aconitate 3-Phosphoglycerate -DOThe tricarboxylate transport system supplies cytosolic acetyl-CoA for palmitate synthesis. What percentage of the NADPH required for palmitate synthesis is thereby provided?Yeasts and plants can use acetyl-CoA as a carbon source by omitting which two steps in the TCA cycle? O Citrate isocitrate; isocitrate → a-ketoglutarate O Isocitrate → a-ketoglutarate; a -ketoglutarate → succinyl-CoA - O Oxaloacetate citrate; malate → oxaloacetate O Succinyl-CoA succinate; succinate → fumarate
- Below is an image of the Krebs cycle: acetyl-CoA oxaloacetate COASH H20 NADH NAD* H20 malate citrate fumarate isocitrate FADH2 NAD* CO2 FAD АТР NADH + ADP succinate GTP NAD+ a-ketoglutarate H20 GDP NADH + CO2 COASH succinyl CoA COASH Consider the conversion of succinate to fumarate, which is coupled with the production the electron carrier FADH2. If this reaction was NOT coupled with the production of FADH2 (and only catalyzed the conversion of succinate to fumarate), how would this impact ATP production through cell respiration? OATP production would stop because no high energy electron carriers would be produced ATP production would still occur, but there would be a much lower ATP yield because a large number of electron carriers are no longer being made ATP production would stop because without FADH2 we will no longer have electrons moving through the electron transport chain ATP production would still occur, but there would be a slightly lower ATP yield because a small number of…What four allosteric enzymes or enzyme complexes are responsible for the regulation of the citric acid cycle? Select all that apply. Malate dehydrogenase Fumarase Succinyl CoA synthetase Aconitase a-ketogluatarate dehydrogenase Succinate dehydrogenase Pyruvate dehydrogenase Citrate synthase Isocitrate dehydrogenaseIn the first step of the TCA cycle the acetyl group of acetyl-CoA is transferred to oxaloacetate to produce citrate. Where will the carbonyl carbon of that acetyl group be after the first CO2 is expelled? Group of answer choices The first carbon of α-ketoglutarate The last carbon of α-ketoglutarate The fourth carbon of α-ketoglutarate The third carbon of α-ketoglutarate
- For arachadic acid calculate the total number of FADH2 and NADH molecules, respectively, that are formed in the B-oxidation and subsequent utilization of CoA in the TCA cycle. Reference figure 23.16 when calculating these values. O 19, 39 14, 26 2,5 12, 12hexokinase catalyzes the first reaction of the glycolysis pathway. What may happen if there is xylose in the reaction place? Briefly explain.Order the following TCA cycle metabolites in the order they appear in the cycle. Not all answers will be used. 1 isocitrate [Choose] oxaloacetate fumarate alpha ketogluterate aconitate isocitrate 3 pyruvate glucose 6-phosphate lactate [Choose ] 1 pts Question 2 In the reaction catalyzed by malate dehydrogenase, which of the following molecules is classified as the reduced 2.
- Organisms growing anaerobically cannot perform glycolysis for long without reducing the pyruvate from glycolysis into another compound, most commonly to lactate or to ethanol plus CO2. Both of these reactions are given below in their unbalanced forms. Explain in one sentence why one of these reducing steps is needed to sustain anaerobic glycolysis.Pyruvate is metabolized involving a multienzyme complex, pyruvatedehydrogenase complex (PDC).(a). What are the main products of PDC reactions?(b). Name two products that inhibit PDC reactions and give the reasons.Arsenate (HAsO42-) can replace inorganic phosphate (Pi) in the reaction catalyzed by glyceraldehyde 3-phosphate dehydrogenase, causing Glyceraldehyde 3-phosphate to be directly converted to 3-phosphoglycerate (NADH is still formed). If a cell is expose to Arsenate, which of the following metabolites of glycolysis will not be detectable in the cell? 2-phosphoglycerate 3-phosphoglycerate Fructose 6-phosphate Glucose 6-phosphate 1,3-bisphosphoglycerate